| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.cassandra.cql3.functions; |
| |
| import java.nio.ByteBuffer; |
| import java.util.List; |
| |
| import org.apache.cassandra.config.CFMetaData; |
| import org.apache.cassandra.config.ColumnDefinition; |
| import org.apache.cassandra.db.CBuilder; |
| import org.apache.cassandra.db.marshal.AbstractType; |
| import org.apache.cassandra.exceptions.InvalidRequestException; |
| import org.apache.cassandra.transport.ProtocolVersion; |
| |
| public class TokenFct extends NativeScalarFunction |
| { |
| private final CFMetaData cfm; |
| |
| public TokenFct(CFMetaData cfm) |
| { |
| super("token", cfm.partitioner.getTokenValidator(), getKeyTypes(cfm)); |
| this.cfm = cfm; |
| } |
| |
| private static AbstractType[] getKeyTypes(CFMetaData cfm) |
| { |
| AbstractType[] types = new AbstractType[cfm.partitionKeyColumns().size()]; |
| int i = 0; |
| for (ColumnDefinition def : cfm.partitionKeyColumns()) |
| types[i++] = def.type; |
| return types; |
| } |
| |
| public ByteBuffer execute(ProtocolVersion protocolVersion, List<ByteBuffer> parameters) throws InvalidRequestException |
| { |
| CBuilder builder = CBuilder.create(cfm.getKeyValidatorAsClusteringComparator()); |
| for (int i = 0; i < parameters.size(); i++) |
| { |
| ByteBuffer bb = parameters.get(i); |
| if (bb == null) |
| return null; |
| builder.add(bb); |
| } |
| return cfm.partitioner.getTokenFactory().toByteArray(cfm.partitioner.getToken(CFMetaData.serializePartitionKey(builder.build()))); |
| } |
| } |